Turning-arm-actuating mechanism for bag-turning machines.



PATENTED MAR. 5, 1907.

' v s; T. LOGKWOOD.

TURNING ARM AGTUATING MECHANISM FOR BAG, TURNING MACHINES.

APPLICATION FILED JAN.15.1906.

PATENTBD MAR. 5, 1907.

s. T. LOGKWOOD. TURNING ARM AOTUATING MECHANISM FOR BAG TURNINGMACHINES;

APPLIOATION FILED JAN. 15. 1906. 3 SHEETB BHBBT Z WU 7 Joa woaal mamasrs'Rs 50., WASHINGTON. o. c.

clear, and exact .tudinally-reciprocatin SAMUEL T. LOCKWOOD,

OF PORTLAND, OREGON TURNlNG-ARlVl-ACTUATING MECHANISM FOR BAG-TURNINGMACHINES.

its. 846,1 19.

Specification of Letters Patent.

Patented Maren 5, 1907.

Application filed January 15,1906- Serial No 296,182.

T at 20720771, it nut concern:

Be it known that I, SAMUEL T. LocKwooD, a citizen of the United States,of Portland, in the county of Multnomah and State of Ore gon, haveinvented certain new and useful Improvements in Turning-Arm-ActuatingMechanism for Bag-Turning Machines; and 1 do hereby declare that thefollowing is a full,

description thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to improvements in bag-turning machines, andrefers more specifically to an improved means of mounting and operatingthe reciprocating bag-turning arms by which the bags are turned andpresented to the stripping and the pressing or flatening rollers.

My improvements are applicable to the general type ofmachine illustratedin my prior United States Letters Patent, No. 350,204, granted October15, 1886, and are herein shown as embodied in a machine having certainof the specific structural features illustrated in my copendingapplication for United States Letters Patent, Serial N 0. 296,181, filedon the 15th day of January, 1906.

The invention consists in the matters hereinafter set forth, and morepointed out in the appended claims.

In the drawings, Figure l is a central vertical section of the centralpart and one end of a bag-turning machine embodying my invention. Fig. 2is a plan View of the frame and carriage and illustrating the manner ofmounting the bag-turning arms. Fig. 3 is a similar view showing thebag-turning arms in a changed position. Fig. 4 is a transverse verticalsection taken on line 4 4 of Fig. 1. Fig. 5 is a detail, partly insection and partly in elevation, illustrating the manner of operatingthe bag-turning arms and adjusting the distance between them. Fig. 6 isa detail section taken on line 6 6 of Fig. 2.

My improvements are shown as adapted to a double machine, embracing twofolding mechanisms and a single intermediate longig part or carriageupon which are mounted two pairs of oppositelyoperating bag-turning armsthat present the turned bags to the pressing-rollers, one of the pairsof arms presenting a turned bag to one pair of pressing-rollers whilethe other pair particularly of arms are being retired from theirassociated pressing-rollers, the arms being thus alternately presentedto the work by a single actuating mechanism. The improvements may,however, be applied to a single machine or one having but one turningmechanism.

My improvements relate to mechanism for givinglongitudinally-reciprocatory motion to the bag-turning arms and forspreading the same outwardly during their outward movement and also tomeans for adjusting said gag-turning arms to suit different widths ofags.

As shown in the drawings, 10 designates as a whole the central frame, onwhich the bagturning arms are mounted, and 11 designates as a whole oneof the bag-turning mechanisms, the essential features of which embracebag-holders 12 and the flattening-rollers 13. The frame 10 embraces topside rails 14 14, bottom side rails 15 15, standards 16, and transversemembers 16, as more clearly shown in Figs. 1 and 4. Mounted toslidelongitudinally of the upper rails of said frame is a carriageconsisting, essentially, of a central longitudinal member 17 andtransverse members 18 and 19. The transverse carriage member 18 islocated near the center of the carriage, and in a completed machine twotransverse members 19 are provided, located one on each side of themember 18.

20 20 designate bag-turning arms arranged in two pairs, as herein shown,and directed toward the opposite ends of the machine. Said arms consistof rods which are hinged at their inner ends to central carriagetransverse member 18 by means of pivot-pins 21. Said arms diverge fromeach other toward their outer ends and are engaged between their endswith rotative pivot studs 23, mounted on said transverse members 19 ofthe carriage, the studs of each pair being located one on each side ofthe longitudinal center of the machine, said pivot-studs being providedwith openings through which said rods extend. Said pivot-studs of eachpair are rotatively mounted in slide-bars 24one at each side of thelongitudinal center of the l machineand fit in grooves or ways formed lin the upper face of said transverse members, I whereby said studs andthe rods carried theret by may be'moved or spread laterally out- Iwardly by means hereinafter described as the bag-turning arms are movedlongitudinally outwardly toward the bag turning l mechanisms. The saidslide-bars 24 are held in said guide-grooves or ways by plates 25, Fig.6, fastened to the upper faces of said transverse members andoverhanging said channels or ways therein.

The means herein shown for spreading the bagturning arms laterally asthe carriage is moved longitudinally toward one of the turning andpressing mechanisms comprises a longitudinal cam or cam-bar 26, Figs. 2and 3, located centrally of the machine and between the turning-arms andfastened to the cross members 16 of the frame. In the type of machineshown two of such cam-bars will be employed. Each of said cam bars orplates 26 cooperates with rollers 27, carried by studs 28, Figs. 4, 5,and. 6, attached to and depending from the sliding bars 24 throughlongitudinal slots 29, Fig. 5, in the transverse carriage members 19.Two of said roller-bearing stud s 28 are provided'one on each side ofthe longitudinal center of the machm ethe rollers of each pair engagingthe opposite inclined sides of the associated cambar. The cam bars orplates 26 are made narrowest at their inner ends, and said rollers ofthe studs are spread gradually apart by their engagement with thegradually-widening cam-bars as the carriage is moved outwardly, therebyspreading laterally the outer ends of the turning-arms for the purposeset forth.

In Fig. 2 the carriage is shown at one extreme limit of its throw withthe outer ends of the bag-turning arms occupying their laterallyinnermost positions, while in Fig. 3 the carriage is shown having beenmoved out wardly to the opposite limit of its throw, thereby spreadingthe turning arms. The said bag-turning arms are restored to their innerpositions when released from the influ ence of the cam bars by springactuated devices made as follows: 30 I30 designate L-shaped leverspivoted to lugs 31, extending inwardly from the transverse carriagemembers 19. The longer arms of said levers bear at their outer endsagainst the laterally outer sides of the studs 28, while the shorterarms thereof bear against springs which tend to force the studs 28laterally inwardly toward each other. As herein shown, said springs havethe form of spiral expansivolyacting springs 32, which surround studs orbolts 33, that extend inwardly or rearwardly from the transversecarriage members 19, and said springs are interposed between nuts orother suitably-formed shoulders 34 at the inner ends of the bolts andthe short memb ers of said L-shaped levers 30, which latter areapertured to pass over said studs or bolts 33, as indicated. in dottedlines in Figs. 2 and 3.

Means are provided for adjusting the pivot-studs 23 toward and from eachother to adapt the arms to bags of different widths. As herein shownsuch adjustment is ell' ected are carried directly by adjusting-plates35, that have adjustable sliding engagement in grooves 36 of theslide-bars 24. Said plates have tapered margins, which engage the cor-.respondingly tapered or undercut side margins in the grooves 36. Saidadjustingplates are adjustably fixed to said sliding bars 24 by means ofscrew-bolts 37, that extend through slots 38 in said adjusting-platesand have screw-threaded engagement with the sliding bars, as mostclearly shown in Fig. 5. "the particular manner herein shown of mountingthe pivot-studs 23 in said adjustingplates 35 consists in providing saidstuds with reduced neck portions or shanks 40, which extend downwardlythrough bear ing-apertures in the adjusting-plates 35 and held in placeby screws 41, which extend upwardly through plates or washers 42 intoapertures in said shank or neck 40. Said plates 42 lit in suitablerecesses in the bottoms of the adjusting-plates, flush with the lowerfaces of the latter, and are made of slightly greater diameter than theopenings of the ad justing-plates, which receive the shanks of saidstuds. This construction permits free rotation of the studs and providesa simple and effective means of attaching the studs to theadjusting-plates. It will be understood, of course, that said studs areattached to the adjusting-plates before the latter are inserted in thesliding bars 24.

Referring now to the means for giving endwise reciprocatory motion tothe carriage and the bag-turning arms carried thereby, the mechanismherein shown for effecting this result is made as follows: 45 designatesa slide which has longitudinally-reciprocating movement in a guide orway formed in an inwardly-projecting ledge or shelf 46, attached to oneof the lower side members of the frame, as shown in Figs. 1 and 4. Saidslide carries at its upper margin a straight rack 47, that meshes with agear-pinion 48, fixed to a shaft 49, that extends transversely acrossthe frame. Said shaft is rotatively mounted in bearings 50, carried byhorizontal bars 51. 51, one on each side of the machine and extendingbetween adjacent uprights or standards of said frame. Said transverseshaft 49 carries also a larger gear-wheel 52, that meshes with adownwardly-facing rackbar 53, that is fixed to the under side of thecarriage. The slide 45 and the rack-bar carried thereb r are iven lonitudinal movement through the medium of a connecting link or pitm an 55,that is hinged. at its inner end to the slide-bar by means of atransverse hinge-pin and is connected at its outer end to a crank-pin57, (shown in dotted lines in Fig. 1,) fixed to a crank-disk 58, mountedon a shaft 59, extending transversely across the machine-frame at oneend of one of the bag-turning mechanisms. 'l he said shaft 59 b thefollowin mechanism: The studs is rotated from the main shaft 60 locatedis l with said turning-arms and traveling against transversely over theshaft 59 and having a gear-pinion 61, that meshes with the gearwheel 62on said shaft 59. Said shaft is provided with a belt-pulley 63, by whichpower is transmitted thereto.

I claim as my invention- 1. In a bag-turning machine, the combinationwith longitudinally-reciprocating, pivoted bag-turning arms, of anelongated cam located centrally of said arms for spreading the outerends of said arms during the longitudinal reciprocation thereof.

2. In a bag-turning machine, the combination with the frame and acarriage reciprocating on said frame, of bag-turning arms carried by andpivoted to the frame and a contrally-located cam for spreading the armsduring the longitudinal reciprocation of the carriage.

3. In a bag-turning machine, the combination with the frame and acarriage reciprocating thereon, of bag-turning arms carried by andpivoted to said carriage, a centrally-located cam or cam-bar havingopposing tapered sides and lugs or projections associated the inclinedfaces of the cam during the longi tudinal reciprocation of the carriage.

4. In a bag-turning machine, the combination with the frame and acarriage reciprocat ing thereon, of. bag-turning arms pivoted at theirinner ends to the carriage, studs rotatively mounted on said carriageand engaging the arms between the ends thereof, and acentrally-looated'cam for spreading the arms during the longitudinalreciprocation of the carriage.

5. In a bag-turning machine, thecombination with the frame and acarriage reciprocating thereon, of bag-turning arms pivoted at theirinner ends to the carriage, studs rotatively mounted on said carriageand engaging said arms between the ends thereof, a centrally-located camhaving inclined faces and studs associated with said arms and travelingagainst the inclined margins of said cam.

6. In a bag-turning machine, the combination with the frame and acarriage reciprocating thereon, of bag-turning arms carried by andpivoted to the carriage, rotative studs engaging said arms,laterally-sliding bars on l the carriage by which said studs arecarried, and a centrally-located cam for spreading or separating saidbars during the longitudinal reciprocation of the carriage.

7. In a bag-turning machine, the combination with the frame and acarriage reciprocating thereon, of bag-turning arms carried by andpivoted at their inner ends to the carriage, rotative studs engagingsaid arms between their ends, laterally-sliding bars mounted on thecarriage by which said studs are carried, roller-bearing studs dependingfrom said slide-bars and a centrally-located cam against the inclinedfaces of which the roller-bearing studs travel during the reciprocationof the carriage.

8. In a bag-turning machine, the combination with the frame and acarriage reciproeating thereon, of bag-turning arms pivoted at theirinner ends to the carriage, rotative studs engaging said arms betweentheir ends, laterally-sliding bars mounted on the carriage by which saidstuds are carried, a centrally-located cam mounted on the frame forspreading said sliding bars and arms during the reciprocation of thecarriage, and means for fixedly adjusting the rotative studs toward andaway from each other.

9. In a bag-turning machine, the combina tion with the frame, and acarriage reciproeating thereon, of bag-turning arms pivoted to saidframe, a centrally-located cam for spreading the arms during thereciprocation of the carriage, and springs for restoring the arms towardeach other when released from said cam.

10. In a bag-turning machine, the combination with the frame and areciprocating carriage thereon, of bag-turning arms carried by andpivoted at their inner ends to the carriage, rotative studs mounted onthe carriage and engaging the bag-turning arms be tween the ends of thelatter, a centrally-located, stationary cam or cam-bar operating tospread said studs apart during the longitudinal reciprocation of thecarriage, and springs applied to move said studs inwardly when releasedfrom the cam.

11. In a bag-turning machine, the combi nation with a frame and acarriage reciproeating thereon, of bag-turning arms carried by andpivoted at their inner ends to the carriage, rotative studs mounted onthe car riage with which the arms are engaged, laterally-sliding barsupon which said rotative studs are mounted, studs depending from saidbars, a centrally-located cam or cam-bar adapted for engagement by thestuds to spread the arms laterally outwardly during the longitudinalreciprocation of the carriage, and springs applied to normally hold saidslide-bars in their innermost positions.

12. In a bag-turning machine, the combination with the frame, a carriagereciprocating on the frame, and a bag holding and pressing mechanism atone end of the frame, of bag-turning arms carried by the carriage, meansfor spreading the arms away from each other during their movement towardsaid holding and pressing mechanism, and means for reciprocating saidcarriage comprising a rack on the under surface of said carriage, alongitudinally-sliding rack in the frame, and gears interposed betweensaid racks.

13. In a bag-turning machine, the combination with the frame, a carriagereciprocating thereon and a bag holding and pressing mechanism at oneend of the frame, of bagturning arms carried by and pivoted to thecarriage, a centrally-located cam for spreading the arms during themovement thereof toward the holding and pressing mechanism, and meansfor reciprocating said carriage comprising a rack on the under surfaceof said carriage, a longitudinally-sliding rack in the frame, a shaftmounted transversely in the machine-frame, a gear-pinion fixed theretoand meshing with said frame-rack and a larger gear-wheel fixed also tosaid shaft and meshing also with the carriage-rack.

14. In a bag-turning machine, the combination with the frame, a carriagereciprocating on the frame, and a bag holding and pressing mechanism atone end of the frame, of bag-turning arms carried by the carriage,

] means for spreading the arms away from each other during theirmovement toward said holding and pressing mechanism, and means forreciprocating said carriage comprising a rack on the under surface ofsaid carriage, a longitudinally-sliding rack in the frame, gearsinterposed between said racks, a crank rotating in unison with the bagholding and pressing mechanism, and a pitrnan connecting said frame-rackwith said crank. In testimony that I claim the foregoing as my inventionI a'llix my signature, in pres ence of two witnesses, this 5th day ofJanuary, A. D. 1906 SAMUEL T. LOCKWOOD. Witnesses ERNEST H. LooKwoon,CAROLINE Sonnnrz.

